#include "fcntl.h"
#include "stdio.h"
#include "unistd.h"

int main()
{
 int fd1,fd2;
 char c;

 fd1 = Open("foobar.txt ",O_RDONLY.0)
 fd2 = Open("foobar.txt ",O_RDONLY.0)
 Read(fd2,&c,1);
 Dup2(fd2,fd1);
 Read(fd1,&c,1);
 printf("c = %c\n",c);
 exit(0);
}
